68508644 has 12 divisors (see below), whose sum is σ = 120519168. Its totient is φ = 34074600.

The previous prime is 68508641. The next prime is 68508647. The reversal of 68508644 is 44680586.

It is an interprime number because it is at equal distance from previous prime (68508641) and next prime (68508647).

It is not an unprimeable number, because it can be changed into a prime (68508641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44072 + ... + 45599.

It is an arithmetic number, because the mean of its divisors is an integer number (10043264).

Almost surely, 2^68508644 is an apocalyptic number.

It is an amenable number.

68508644 is a deficient number, since it is larger than the sum of its proper divisors (52010524).

68508644 is a wasteful number, since it uses less digits than its factorization.

68508644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89866 (or 89864 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 68508644 is about 8276.9948652878. The cubic root of 68508644 is about 409.1806838725.

The spelling of 68508644 in words is "sixty-eight million, five hundred eight thousand, six hundred forty-four".